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对非自旋再入弹头的动力学模型进行了分析,将俯仰通道和偏航通道间的耦合项看作是不确定项,对弹头的姿态动力学模型进行了变形和简化。为了克服耦合项的影响,提高变质心控制系统的鲁棒性和控制精度,采用自适应模糊滑模控制方法分别设计了俯仰通道和偏航通道的变质心控制系统,控制两个质量块的运动。仿真结果表明:在所设计的变质心控制系统的控制下,弹头的俯仰角和偏航角都能快速而准确地跟踪其指令信号,跟踪精度达到99.7%。
The dynamics model of non-spin reentry warhead is analyzed, and the coupling between pitch channel and yaw channel is considered as an indefinite term. The attitude dynamics model of warhead is transformed and simplified. In order to overcome the influence of the coupling term and improve the robustness and control precision of the variable mass center control system, the adaptive mass control system of pitch and yaw channels is designed respectively by adaptive fuzzy sliding mode control to control the movement of two mass masses . The simulation results show that the pitch and yaw angle of the warhead can quickly and accurately track the command signal under the control of the designed variable center control system, and the tracking accuracy reaches 99.7%.